308
FNAK72 PAFC 171813
FWSALU

Spot Forecast for FY 2026 Katmai Pile Burning...Wildland Fire Service (NPS)
National Weather Service ANCHORAGE AK
1013 AM AKDT Thu Sep 17 2026

Forecast is based on ignition time of 1000 AKDT on September 17.
.DISCUSSION...

A Bering low will keep cloudy conditions through out the day.
Scattered showers will transition to a steady rain late this
afternoon and continue into the evening hours. Winds will be out
of the southeast at 5 to 10 mph. Temperatures will be in the lower
50`s with humidity values around 85 percent through the evening
hours.



.REST OF TODAY...

Sky/weather.........Cloudy (85-95 percent). Chance of rain in the
                    late morning and early afternoon, then rain
                    showers likely late in the afternoon.
CWR.................0 percent increasing to 58 percent late in the
                    afternoon.
Chance of pcpn......60 percent.
Max temperature.....Around 52.
Min humidity........80 percent.
Wind (20 ft)........Southeast winds 6 to 7 mph.
Mixing height.......2100 ft AGL.
Transport winds.....South 14 to 16 mph.
Pcpn amount.........0.06 inches.
Snowfall amount.....0.0 inches.

TIME (AKDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........86  86  86  86  86  86  94  94
Weather cov.....CHC CHC CHC CHC CHC CHC LKY LKY
Weather type....RN  RN  RN  RN  RN  RN  RW  RW
CWR.............0   0   0   0   0   0   60  60
Chc of pcpn (%).40  40  40  50  50  50  60  60
Temp............45  47  49  50  51  52  51  50
RH..............94  89  84  80  80  81  82  82
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  SE
20 FT wind spd..6   6   6   7   7   7   7   7
20 FT wind gust.8   8   8   13  13  13  13  13
Mix hgt (kft)...2.1 2.1 2.1 2.1 2.1 2.1 1.5 1.5
Transp wind dir.S   S   S   S   S   S   S   S
Transp wind spd.14  14  14  16  16  16  16  16

.TONIGHT...

Sky/weather.........Cloudy (90-100 percent). Steady rain during
the evening and overnight hours.
CWR.................60 percent decreasing to 40 percent after 3 am.
Chance of pcpn......60 to 80 percent.
Min temperature.....Around 41.
Max humidity........99 percent.
Wind (20 ft)........Southeast winds 6 to 7 mph.
Mixing height.......500 ft AGL.
Transport winds.....South 9 to 16 mph.
Pcpn amount.........0.30 inches.
Snowfall amount.....0.0 inches.

TIME (AKDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........94  96  96  96  92  92  92  93  93  93  95  95
Weather cov.....LKY LKY LKY LKY DEF DEF DEF LKY LKY LKY LKY LKY
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
CWR.............60  60  60  60  60  60  60  60  60  60  40  40
Chc of pcpn (%).60  70  70  70  80  80  80  70  70  70  60  60
Temp............49  48  48  47  47  47  46  45  45  44  43  43
RH..............87  89  91  93  92  94  94  96  95  94  95  96
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  S   S   S   SE  SE
20 FT wind spd..7   6   6   6   6   6   6   7   7   7   7   7
20 FT wind gust.13  9   9   9   7   7   7   9   9   9   9   9
Mix hgt (kft)...1.5 1.5 1.5 1.5 0.5 0.5 0.5 0.5 0.5 0.5 0.6 0.6
Transp wind dir.S   S   S   S   S   S   S   S   S   S   S   S
Transp wind spd.16  14  14  14  13  13  13  10  10  10  9   9

.FRIDAY...

Sky/weather.........Cloudy (85-95 percent). Rain showers likely.
CWR.................41 percent.
Chance of pcpn......60 percent.
Max temperature.....Around 50.
Min humidity........78 percent.
Wind (20 ft)........Southeast winds 6 to 9 mph.
Mixing height.......1700 ft AGL.
Transport winds.....South 9 to 10 mph.
Pcpn amount.........0.14 inches.
Snowfall amount.....0.0 inches.

TIME (AKDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........95  95  95  95  91  91  91  83  83  83  81  81
Weather cov.....LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
CWR.............40  40  40  40  40  40  40  40  40  40  40  40
Chc of pcpn (%).60  60  60  60  60  60  60  60  60  60  60  60
Temp............42  42  41  41  42  44  46  47  49  49  50  49
RH..............96  97  98  99  98  94  88  83  80  78  78  79
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  S   S   S   SE  SE
20 FT wind spd..7   7   7   7   6   6   6   8   8   8   9   9
20 FT wind gust.9   9   9   9   9   9   9   12  12  12  14  14
Mix hgt (kft)...0.6 0.6 0.6 0.6 1.4 1.4 1.4 1.4 1.4 1.4 1.7 1.7
Transp wind dir.S   S   S   S   S   S   S   S   S   S   SW  SW
Transp wind spd.9   9   9   9   10  10  10  10  10  10  10  10

$$
Forecaster...SESLAR
Requested by...Nathan Gilmore
Type of request...PRESCRIBED
.TAG 2622075.0/ALU
.DELDT 09/17/26
.FormatterVersion 2.0.0
.EMAIL Nathan_Gilmore@nps.gov